Rotary blower or compressor.



Patented 001;. 27, 1908.

0; P. OSTERGREN & G. O. L. GARDELL.

ROTARY BLOWER 0R GOMPRESSOR.

APPLICATION FILED APR.11, 1906.

pairs s Arne PZFET OSCAR PZ OSTERGREN, OF NEW YORK, AND CHARLES O. L. OARDELL, OF PEARL RIVER,

NEW YORK.

Specification of Letters Patent.

ROTARY BLOWER OR COMPRESSOR.

PatentegLOgt. 27, 1908.

Application filed April 11, 19(16. 7 Serial No. 311,051.

To ,llomit may concern.

Be it known that we, OSCAR P. Osrnn- GREN, a subject of the Crown of Sweden, and resident of the borough of Manhattan, of the New York, county and State of New 1' orlr, and CHARLES O. L. OARDELL, a citizen of the United States of America, and resi earl River, county of Rockland, and

1' New York have .invented certain new and useful Improvements in Rotary Blowers or Compressors,.of which the following is a specification, reference beinghad to the accompanying drawings, forming a part thereof.

Our invention relates to rotary blowers or compressorsof the type designed tooperate at extremely high speeds.

The main object ofour invention is to so construct and arrange the impelling wheel that it shall be permitted, within certain limits, to select its own pat-h of movement of rotation. To this end we supply means, such as a light flexible shaft, for supporting the wheel, such as will permit relative movements of the wheel transverse the plane of rotation, and provide a driving means therefor which, while ositively connected therewith in driving re ation, will also permit such relative transverse movements.

Vi e also provide the wheel with blades or vanes upon oppositesides thereof so as to balance the pressure longitudinally of the axis of rotation in opposite directions, and with balancing orifices through the wheel contiguous the blades, and our invention further consists in certain details of construc tion and. combination of parts as will be hereinafter more fully pointed out.

In order that our invention may be fully understood, we will now proceed to de scribe an embodiment thereof with reference in Fig. 4 the construction whereby the same may be adjusted relatively to the wheel carrying it.

Referring to the drawings by reference .ble shaft 6.

characters, 5 designates the impelling wheel, which is supported by means of a small flexi- T his shaft 6 is ournaled at one end in a stationary bearing 7, and at the other end in a hollowed-out portion 8 of a driving shaft 9. The driving shaft 9 is journaled in a stationary bearing 10 upon the opposite side of the impelling wheel 5 to which the bearing 7 is located, and the said shaft 9 is connected to the impelling wheel 5 in such a manner as to impart positive driving -move1nents thereto by means of pins 11 and slots 12. This pin and slot connection constitutesa universal joint which, while enforcing positive driving connections, permits relative movements of the wheel 5 transverse of the axis of rotation thereof. The shaft 6 being an exceedingly light and flexible shaft, will further permit such movements within certain limits, the said shaftspringing and bowing to permit such movements. The shaft 9 may be conveniently connected with some very high speed motor, such, for instance, as a turbine engine, whereby an exceedingly high velocity of movement will be imparted to the inipelling wheel 5. The result will be that the wheel 5 will be permitted to slightly vary its position from the position occupied whennormally at rest, so that it shall select its own path of rotation. In this way the machine will be relieved of great strains, and a higher speed of rotation will be possible before the danger limit is reached than would be possible if the said wheel 5 were rigidly connected with the relatively heavy shaft 9.

The impelling wheel 5 is provided with blades or vanes 13 upon opposite sides there of. These blades or vanes are arranged in concentric series upon opposite sides, and are alternated with corresponding series of stationary blades orwanes projecting inwardly from the casing 15 upon opposite sides of said impelling wheel. In cross section the chamber inclosed by the casing walls 15 converges radially in a direction away from the axis of the machine, and similarly the length to which the blades or vanes 13, 14 project from the parts carrying them lessens progressively in the same direction.

The blades or vanes 13 upon opposite sides of the impelling wheel are preferably made, each pair, out of a single piece of metal fitted with a drive fit to said wheel. By this arrangement the blades may be slightly ad- LOO justed with respect to the wheel when the 'device is first set up, as will be well understood. Communication is provided between opposite sides of the impelling Wheel by means of openings '18 (contiguous each'pair of blades or vanes upon the wheel,) the orifices 16 being conveniently made throu h the iece of metal out of which the said pair of b ades' or vanes are formed.- These orifices act as balancing orifices, so as to he] preserve a balance of ressure between t 1e opposite sides of "the W eel whereby to militate against any and thrust.

In operation air is taken in at thecenter of the impelling wheel, and passes through the blades or vanes, the pressure of the air being raised during the process, and the said air iin l der the greater'pressure will be delivered into a spiral delivery space 16 which vents to a passage 17. The casing 13 may conveniently be jacketed, as at 17 ,the said jacket arranged to receive a cooling medium, by which the heat generated in the device may be conveyed away, as will be well understood. I

It will be apparent from the foregoing that the device may be employed either as a compressor for taking in air at atmospheric pres.- sure and delivering, it at a pressure t' ereabove, or as. a so-called vacuum ump for taking air at a pressure below that of atmosphereand delivering it at atmospheric pressure or at a pressure thereabove.

What we claim is:

1 The combination with a rotatable element and a relatively heavy shaft, of a relatively light flexible shaft supporting the said rotatable element, and a universal joint connection between the'heavy shaft and the rotatable'elementconnecting the same together in driving relation but permitting relative movements of the rotatable element transverse ofthe axis of rotation of the said heavy shaft.-

2. The combination with a rotatable element, of a relatively'heavy drive shaft there for, a loose connection between said relatively heavy shaft and said rotatable element permitting relative movements be tween the two, and a light flexible shaft supporting said rotatable e ement.

3. The combination with a rotatable element, of a relatively heavy drive shaft there- -for, saidshaft journaled on oneside'of said rotatable element and having a loose driving connection with said rotatable element permitting relative -movements thereof transverse of the axis of rotation of the said shaft,- and a light flexible shaft su porting said rotatable element, said flexib e shaft having a bearing on one side in said heavy shaft, and journaled in a stationary bearing upon the other side of said rotatable element 4. The combination with a driving and a driven member comprising a relatively heavy shaft and a rotatable element, of a plurality of pins upon one of the said members and a plurality of slots in which the said pins are freely received, iii the other said member,

and a light flGXib'l B shaft supporting the said rotatable element. t j

'5. An impelling wheel having a series of transverse openings therethrough and rovided with a corresponding series of mem ers each comprising a-central supporting portion fitted to a said opening and blades projecting I in opposite directions from said centralportion. s 4

6. An impelling wheel provided with blades upon opposlte sides thereof, and having balancin openings therethrough con- Y tiguous the said'blades.

- site directions from said shank ortion, said shank portion having an orlfice t erethrough.

OSOAR P. OSTERGREN. CHARLES O. LOARDELL. Witnesses as to Oscar P. Ostergren:

D. HOWARD HAYWOOD, C. F. CARRINGTONJ Witnessesas to Charles 0. L. Cardell:

O. O. HAMMOND, IRVEN H. DEXTER.- 

